KR101003460B1 - ESR Advanced Treatment System for Removal of Nutrients from Sewage and Sewage - Google Patents

Abstract

The present invention relates to an advanced treatment apparatus for sewage and sewage using SBR (Sequencing Batch Reactor) capable of removing nutrients as well as organic contaminants in sewage and sewage. (11), sedimentation screen tank (12), flow adjustment tank (20), microorganism selection tank (30), main reaction tank (40), sludge fermentation tank (87), sludge concentration tank (88), flocculation tank (54), filtration tank ( 60), an ultraviolet sterilizer 71, a discharge tank 73, and the like, and in order to connect these treatment tanks, a metering tank is provided to maintain a constant flow rate between the treatment tanks by the inner wall 82. The sludge produced in (40) is fermented in the sludge fermentation tank (87) and the fermentation broth formed is supplied as an external carbon source for denitrification to the microorganism selection tank (30), which is the preliminary stage of the main reaction tank (40), and the backwashing pipe is provided in the filtration tank (60). It is connected.
Through the present invention, it is possible to secure the stability of the treatment process by freely controlling the flow rate of the treatment tank as well as to maintain a constant, and improve the denitrification efficiency by fermenting the sludge produced in the main reaction tank 40 as an external carbon source As a preliminary step of the main reaction tank 40, the flow control tank 20 and the microbial selection tank 30 are configured to perform temporary storage and denitrification pretreatment of the influent raw water, thereby enabling a more flexible response to the inflow load than the conventional continuous batch reactor. The effect of improving the process continuity can be obtained.

Description

ADVANCED TREATMENT APPARATUS FOR REMOVING NUTRIENTS OF SEWAGE USING SEQUENCING BATCH REACTOR}

The present invention relates to an advanced treatment apparatus for sewage and sewage using SBR (Sequencing Batch Reactor) capable of removing nutrients as well as organic contaminants in sewage and sewage. (11), sedimentation screen tank (12), flow adjustment tank (20), microorganism selection tank (30), main reaction tank (40), sludge fermentation tank (87), sludge concentration tank (88), flocculation tank (54), filtration tank ( 60), an ultraviolet sterilizer 71, a discharge tank 73, and the like, and in order to connect these treatment tanks, a metering tank is provided to maintain a constant flow rate between the treatment tanks by the inner wall 82. The sludge produced in (40) is fermented in the sludge fermentation tank (87) and the fermentation broth formed is supplied to the microbial selection tank (30), which is the preliminary stage of the main reaction tank (40), as an external carbon source for denitrification, and the filtration tank (60) and the discharge tank (73). ) Is connected to the pressure feeding pipe (96) and the backwash water discharge pipe (97) is installed to pressurize the final discharged water. The backwashing of the filtration tank 60 is made possible by conveyance.

SBR (Sequencing Batch Reactor), or continuous batch reactor, is a highly treated reactor that can remove nutrients as well as organic matter in sewage and sewage. Unlike the activated sludge method, one reactor is divided in time to perform inflow, aeration, agitation, precipitation and discharge in stages.

The continuous batch reactor allows one reactor to perform all the roles of anaerobic tank, aeration tank, anoxic tank, and precipitation tank. It can be operated in various ways depending on the type of pollution of sewage.

However, due to the basic structure and treatment techniques, continuous inflow and continuous processing are impossible, and thus, when the inflow load of raw water changes rapidly, it is difficult to respond flexibly, and the nitrogen content of the contaminants in the raw water is relatively high. Due to the characteristics of the sewage in our country, sufficient denitrification had many problems.

The present invention was made in view of the above-mentioned problems, and in the SBR (Sequencing Batch Reactor) advanced treatment apparatus for removing organic contaminants and nutrients from sewage and sewage, Swivel sedimentation tank (11) for sedimenting and removing solids in raw water, including earth and sand, sedimentation screen tank (12) for sedimenting, capturing, and removing suspended and drifting solids in raw water; And a microorganism selection tank (30) for releasing phosphorus (P) and denitrification in an oxygen-free atmosphere, to increase the dephosphorization efficiency by temporarily storing raw water, and to absorb the sudden load shock. Is divided by the overflow wall 82, and the rear portion of the overflow wall 82 is connected to the microbial selection tank 30 and the flow rate adjustment tank 20 through the supply pipe 93 and the delivery pipe 91 in which the on-pipe pump is installed. The front part of the overflow wall 82 The raw water metering tank 21 connected to the flow rate adjusting tank 20 through the pipe 92 and the microbial selection tank 30 and an aerator 41 and a symbol receiving device 42 are installed therein, Symbolic water discharged from the main reactor (40) is connected to the main reactor (40), the coagulant tank (52) and the coagulant aid tank (53) operating in the inflow, aeration, anoxic, precipitation, discharge and rest stage (上 澄 水) A line mixer 51 for mixing the flocculant and the coagulant aid in the coagulation agent, and a coagulation tank 54 in which the slow stirrer 55 is incorporated to form flocs in the treated water introduced from the line mixer 51. ), A filter tank 60 for filtering the treated water having a built-in filter medium 61 therein, an ultraviolet sterilizer 71 for sterilizing the filtered treated water, and a parshall flume at the inlet. A discharge tank 73 is installed to measure the flow rate and discharge the final treated water, and the sludge discharged from the main reaction tank 40 is stored and fermented. Sludge fermentation tank (87) for generating and supplying the microorganism selection tank (30) as a carbon source, and a sludge concentration tank (88) for storing and concentrating sludge discharged from the sludge fermentation tank (87). SBR (SBR) advanced processing unit for nutrient removal.

In addition, the inlet port of the coagulation tank 54 and the filtration tank 60 is connected to the filtration tank inlet pipe 94 in which the filtration tank inlet valve 83 is installed, and the outlet and the discharge tank 73 of the filtration tank 60 are the filtration tank discharge valve. (84) is connected to the filtration tank discharge pipe (95), and the filtration tank discharge pipe (95) between the filtration tank 60 and the filtration tank discharge valve 84, the pressure feed valve 85 and the pump connected to the discharge tank (73) A pipe 96 is connected, and the front end of the filter medium 61 of the filtration tank 60 and the flow rate adjustment tank 20 are connected to a backwash water discharge pipe 97 in which a backwash valve 86 is installed. In the state where the valve 86 is opened and the filtration tank inlet valve 83 and the filtration tank discharge valve 84 are closed, the treated water in the discharge tank 73 is pumped to the filtration tank 60 through the pressure feed tube 96, thereby filtering the filtration tank 60. ) Nutrients of sewage and sewage, characterized in that the filter medium 61 is backwashed and the backwash water flows into the flow regulating tank 20 through the backwash water discharge pipe 97. SB is Al (SBR) high processing apparatus for removing current.

Through the present invention, it is possible to secure the stability in the treatment process by freely adjusting the flow rate in the distribution of treated water between treatment tanks, and to maintain a constant, fermented sludge produced in the main reaction tank 40 to utilize as an external carbon source By improving the denitrification efficiency, the flow control tank 20 and the microbial selection tank 30 are configured as the main reaction tank 40, and the temporary storage and denitrification pretreatment of the inflowed water are carried out to the inflow load compared to the conventional continuous batch reactor. It is possible to cope with elasticity and to improve the processing continuity.

In addition, a bypass type pressure pipe (96) connecting the filtration tank (60) and the discharge tank (73), and a backwash water discharge pipe (97) connecting the filtration tank (60) and the flow rate adjustment tank (20) are installed. By utilizing the backwashing of the filtration tank 60 can reduce the water demand required in the operation of the treatment facility, it is possible to ensure the treatment quality by sterilizing the final discharged treated water through the ultraviolet sterilizer (71).

1 is a block diagram of the present invention
Figure 2 is a schematic diagram of the operating principle of the raw water metering tank of the present invention
Figure 3 is a structural diagram of the main reactor of the present invention
Figure 4 is an explanatory view of the filtration tank backwashing method of the present invention
5 is an exemplary view of parshall plume applied to the present invention

Detailed configuration and processing of the present invention will be described with reference to the accompanying drawings.

First, FIG. 1 shows each treatment tank constituting the present invention and a connecting pipe line between the treatment tanks. As can be seen from the drawings, the present invention provides a swinging needle removal tank 11 and a needle screen screen 12. ), Flow adjustment tank 20, microorganism selection tank 30, main reaction tank 40, line mixer 51, flocculant tank 52, flocculation aid tank 53, flocculation tank 54, filtration tank 60 , UV sterilizer (71), parshall plume (72), discharge tank (73), sludge fermentation tank (87), sludge concentration tank (88), sludge dehydrator (89) and pipes connecting each of these unit treatment devices, valves, and It consists of a pump.

In addition, the PLC for opening and closing the valves and pumps in the pipeline and controlling the processing steps by reading signals such as a water level meter, a hydrogen ion pH meter and a flow meter installed in each unit processing device ( Control panel such as Programmable Logic Controller is connected.

The sewage and sewage to be treated, which includes various suspended and drifted solids, organic contaminants, nutrients, etc., that is, raw water, flows into the rotary sedimentation removal tank 11 and is separated into the first solid solution.

Swivel settling removal tank 11 is a rapid flow of sedimenting the solids in the treated water in the lower portion of the treatment tank through the downward swirl flow generated in the treated water introduced in a tangential direction to the circular tank, and the supernatant separated from the solid is discharged to the outside As a sedimentation facility, sediment and sediment in raw water are sedimented.

Residual suspended and drifted solids in the raw water that have passed through the swing-type immersion removal tank 11 are sedimented, captured and removed by the immersion screen tank 12. In the illustrated embodiment, an automatic bar screen 13 is shown. This is applied to remove the solids in the raw water is discharged, the raw water from which the solids are removed is then supplied to the flow rate adjustment tank (20).

The flow adjustment tank 20 temporarily stores the incoming raw water and adjusts the raw water flow rate supplied to the treatment tank after the sudden change of the raw water flow rate such as a sudden excessive inflow of raw water, so as to absorb the sudden load shock of the inflow load and promote stable operation of the entire process. Anaerobic stirring is carried out through a transverse mixer 81 to homogenize the raw water and at the same time induce excess phosphorus (P) to increase the dephosphorization efficiency.

The treated water passing through the flow adjustment tank 20 is supplied to the microbial selection tank 30, the anaerobic or anoxic agitation by the transverse mixer 81 is also performed, and the phosphorus (P) discharge and At the same time, the sludge fermentation broth from the sludge fermentation tank 87 described below is supplied as a nitrification liquid, that is, an external carbon source, to perform denitrification.

Here, the flow rate adjustment tank 20 and the microorganism selection tank 30 can be connected through the overflow type raw water metering tank 21 as shown in FIG. 1 to maintain a constant supply flow rate. And the principle of action is shown in Figure 2 excerpt.

As shown in FIG. 2, the raw water metering tank 21 is divided by the overflow wall 82a and the rear portion of the overflow wall 82a, that is, the upstream side of the overflow wall 82a is connected to the supply pipe 93a and the conduit. It is connected to the microorganism selection tank 30 and the flow rate adjustment tank 20 through the discharge pipe 91a provided with the upper pump, respectively, and the front part of the overflow wall 82a, ie, the downstream side of the overflow wall 82a, has a recovery pipe 92a. It is connected with the flow rate adjustment tank 20 through.

The overflow wall 82a installed in the raw water metering tank 21 is a weir for maintaining a constant level of the rear part, and the raw water metering tank 21 is extended by applying a V-notch type weir to extend the overflow width. It can also be downsized.

Through the raw water metering tank 21, the water level behind the upstream wall 82a to which the supply pipe 93a is connected can be kept constant, whereby the treatment is supplied to the microbial selection tank 30 only by simple valve operation of the supply pipe 93a. Accurately adjust and maintain the flow rate of the water.

The treated water passing through the microbial selection tank 30 is introduced into the main reaction tank 40, which is an SBR reaction tank, so as to fill, aerobic, anoxic, settle and draw. And it is advanced during the step-by-step processing of the idle (idle).

As shown in FIG. 3, the main reactor 40 of the present invention is provided with a symbol receiving device 42, which is a continuous selective intake device for each level, and an aerator 41, which is an aeration device, and is located at a rear end, ie, downstream. The discharge chamber 43 is formed at the end to temporarily store the symbol water discharged through the symbol receiving device 42.

In addition, a pump suction type sludge collecting device for collecting sedimented sludge as shown, and an electric valve connected to an outlet of the ultrasonic water level gauge and the supernatant water discharge device may be configured, and these pumps, valves, and measuring devices may be configured as described above. It can be automatically operated in connection with a control panel such as a programmable logic controller (PLC).

In the operation step of the main reactor (40), first in the inflow step, the treated water flows in contact with the microorganisms remaining in the main reactor (40) and supplies the organic matter, the release of phosphorus (P) through the anaerobic reaction and removal of organic matter Is performed.

The aeration step, that is, the aerobic reaction step is to operate the aerator 41 to supply air to the treated water to perform intake and removal and to remove ammonia through nitrification, and the subsequent anoxic step stops giving up. Stirring at will lead to denitrification.

In the sedimentation step, the sludge is induced and at the same time, symbol water is formed, and in the discharging step, the symbol water is discharged to the discharge chamber 43 at the rear end of the main reaction tank 40 by the symbol receiving device 42, and the rest stage Esla will stabilize the sludge settled before the subsequent inflow stage.

As such, the treated water passing through the main reaction tank 40 is treated water in a state where the biological treatment is substantially completed, and is purified after subsequent aggregation and sterilization treatment.

The treated water discharged from the discharge chamber 43 of the main reaction tank 40, that is, the supernatant water, is introduced into a line mixer 51 to which the coagulant tank 52 and the coagulant auxiliary tank 53 are connected, and the PAC ( It is rapidly mixed with flocculants such as Polyaluminum Chloride) and flocculent aids such as sodium hydroxide (NaOH).

The line mixer 51 is provided with a releasing rod or screw that rotates inside the cylinder, and unlike a stirrer that is processed in a storage state, a flocculant and a coagulant may be continuously added to the treated water passing through the pipeline without stagnation. Will be mixed.

The treated water passing through the line mixer 51 is supplied to the flocculation tank 54 in which the slow stirrer 55 is installed, and is slowly stirred to induce floc formation by the flocculant. Iv) 61 is filtered while passing through the built-in filtration tank 60.

Filtration tank 60 may be embedded with various types of media (61), such as particulate, fibrous and reticulated, and contaminants in the pores or mesh of the media (61). Backwash is performed when deposited and occluded.

Backwashing of the present invention filtration tank 60, as shown in Figs. 1 and 4, through the pressure feed pipe 96 connected to the discharge tank 73, the backwash water discharge pipe 97 connected to the flow rate adjustment tank 20 and the attached valves, etc. This can be done without disassembly of the filtration tank 60 or supply of external backwash water.

The left figure of FIG. 4 shows the normal operation state of the filtration tank 60, and the right side figure shows the backwash state of the filtration tank 60. As shown in FIG.

That is, as shown in FIG. 4, the inlet port of the coagulation tank 54 and the filtration tank 60 is connected to the filtration tank inlet pipe 94 provided with the filtration tank inlet valve 83, and the outlet and the discharge tank 73 of the filtration tank 60. ) Is connected to the filtration tank discharge pipe (95) provided with a filtration tank discharge valve 84, the filtration tank discharge pipe (95) between the filtration tank 60 and the filtration tank discharge valve 84 and the pressure feed valve (85) and the discharge tank (73) and A pressure feed pipe (96) having a pump connected thereto is connected, and the front end of the filter medium (61) of the filtration tank (60), that is, the space of the inlet side of the filter medium (61) and the flow rate adjusting tank (20) have a backwash water discharge pipe (100) equipped with a backwash valve (86). (97), the pressure feed valve (85) and the backwash valve (86) is opened and the filtration tank inlet valve (83) and the filtration tank discharge valve (84) in the closed state through the filtration tank (96) As the treated water in the furnace discharge tank 73 is pumped, contaminants deposited on the filter medium 61 in the filtration tank 60 are removed and backwashed, and the contaminated backwash water is connected to the backwash water discharge pipe 97. Through the flow adjustment tank 20 is to be reprocessed.

On the other hand, although not shown, a bypass pipe is provided between the filtration tank inlet pipe 94 and the filtration tank discharge pipe 95, and the backwash can be discharged without bypassing the entire process by bypassing the treated water.

The treated water filtered while passing through the filtration tank 60 is sterilized while passing through the ultraviolet sterilizer 71 and introduced into the discharge tank 73 which is the final storage tank of the treated water.

A Parshall flume 72 is installed at the inlet of the discharge tank 73 to measure the flow rate of the treated water flowing therein, and the Parshall plume 72 has a simple structure and is easy to measure. Not only that, but also the maintenance is easy.

The flow rate measurement through the parshall plume 72 is carried out through level measurement and conversion at a specific point in the plume, and the flow rate measurement is automatically performed by connecting the level meter for level measurement with a microcontroller unit (MCU) or a computer through the aforementioned PLC. The calculation is possible.

On the other hand, as shown in Figure 1, the sludge collected in the main reaction tank 40 is processed through the sludge fermentation tank 87, the sludge concentration tank 88 and the sludge dehydrator 89 is finally dewatered and disposed of or recycled, The sludge fermentation broth generated in this process is supplied to the microbial selection tank 30 as a nitrification solution, that is, an external carbon source, to improve the denitrification efficiency.

The sludge fermentation tank 87 stores the sludge collected and discharged in the main reaction tank 40 to form a fermentation broth by anaerobic fermentation treatment, and the formed fermentation broth is supplied to the microbial selection tank 30 through the nitrification tank 31. .

The nitric oxide metering tank 31 is a fixed-quantity supply means that operates in the same manner as the raw water metering tank 21 described above, and as shown, the inside is divided by the overflow wall 82b and the overflow wall 82b. ) Is connected to the microorganism selection tank 30 and the sludge fermentation tank 87 through a supply pipe 93b and a discharge pipe 91b provided with a pipeline pump, respectively, and the front portion of the overflow wall 82b is a recovery pipe 92b. It is connected with the sludge fermentation tank 87 through.

Through such a nitric oxide metering tank 31, the flow rate of the nitric oxide supplied to the microorganism selection tank 30 can be accurately adjusted and maintained by simple operation of the valve on the supply pipe 93b.

Excess sludge precipitated in the sludge fermentation tank (87) is supplied to the sludge thickening tank (88) and concentrated, and the sludge with reduced water content during the concentration process is dewatered and discharged through the sludge dehydrator (89), although not shown, sludge dehydrator Water contained in the sludge generated in the dehydration process of (89) is discharged to the flow control tank 20 to be reprocessed.

11: Swing type sedimentation tank
12: sedimentation screen tank
13: automatic bar screen
20: flow adjustment tank
21: Raw water metering tank
30: microorganism selection tank
31: nitric oxide metering tank
40: main reactor
41: aerator
42: symbol receiving device
43: discharge chamber
51: line mixer
52: flocculant tank
53: flocculation aid tank
54: coagulation tank
55: slow stirrer
60: filtration tank
61: filter media
71: UV sterilizer
72: Parshall flume
73: discharge tank
81: lateral mixer
82: overflow wall
83: filtration tank inlet valve
84: filtration tank discharge valve
85: pressure feed valve
86: backwash valve
87: sludge fermentation tank
88: sludge concentration tank
89: sludge dehydrator
91: delivery pipe
92: recovery pipe
93: supply pipe
94: filtration tank inlet pipe
95: filtration tank discharge pipe
96: pressure pipe
97: backwash water discharge pipe

Claims (2)

In the SBR (Sequencing Batch Reactor) advanced treatment device for removing organic contaminants and nutrients from sewage and sewage,
A swing-type sedimentation removal tank 11 for sedimenting and removing solids in raw water, including contaminants and earth and sand, by a downward swirling flow in a circular tank;
A sedimentation screen tank 12 for sedimenting, capturing, and removing raw and suspended solids in raw water;
A flow rate adjustment tank 20 for temporarily storing raw water that has passed through the immersion screen tank 12 to increase dephosphorization efficiency and absorb inflow load sudden impact;
A microbial selection tank 30 for performing phosphorus (P) release and denitrification in an oxygen-free atmosphere;
The inside is divided by the overflow wall 82 and the rear portion of the overflow wall 82 is provided with a microbial selection tank 30 and a flow rate adjusting tank 20 through a supply pipe 93 and a delivery pipe 91 in which a pump on a pipeline is installed. A raw water metering tank 21 connected to the overflow wall 82 and connected to the flow rate adjusting tank 20 through a recovery pipe 92;
A main reactor (40) connected to the microbial selection tank (30) and installed inside the aerator (41) and the symbol receiving device (42), operating in inflow, aeration, oxygen-free, precipitation, discharge and rest phases;
A line mixer 51 connected with the coagulant tank 52 and the coagulant aid tank 53 to mix the coagulant and the coagulant aid with the supernatant discharged from the main reaction tank 40;
A coagulation tank 54 in which a slow stirrer 55 is embedded to form flocs in the treated water introduced from the line mixer 51;
A filtration tank 60 in which a filter medium 61 is embedded to filter the treated water in which flocs are formed;
An ultraviolet sterilizer 71 for sterilizing the filtered treated water;
Parshall flume (72) is installed in the inlet portion discharge tank 73 for measuring the flow rate and discharge the final treated water;
A sludge fermentation tank 87 for storing sludge discharged from the main reaction tank 40 and generating a fermentation broth as a carbon source to the microorganism selection tank 30;
SBI advanced treatment apparatus for removing nutrients of sewage and sewage, characterized in that the sludge concentration tank 88 for storing and condensing the sludge discharged from the sludge fermentation tank (87).
The inlet of the coagulation tank 54 and the filtration tank 60 is connected to the filtration tank inflow pipe 94 provided with the filtration tank inflow valve 83;
The outlet of the filtration tank 60 and the discharge tank 73 are connected to the filtration tank discharge pipe 95 in which the filtration tank discharge valve 84 is installed;
A filtration tank discharge pipe (95) between the filtration tank (60) and the filtration tank discharge valve (84) is connected to a pressure feeding pipe (96) provided with a pump connected to the pressure feeding valve (85) and the discharge tank (73);
The front end of the filter medium (61) of the filtration tank (60) and the flow adjustment tank (20) are connected to a backwash water discharge pipe (97) provided with a backwash valve (86), so that the pressure feed valve (85) and the backwash valve (86) are opened and the filtration tank is opened. The inflow valve 83 and the filtration tank discharge valve 84 are closed, and the filtered water in the effluent tank 73 is pumped to the filtration tank 60 through the pressure pipe 96 so that the filter medium 61 in the filtration tank 60 is backwashed. (Iii) and the backwash water is an SBI advanced treatment apparatus for removing nutrients of sewage and sewage, characterized in that the flow rate adjustment tank 20 is introduced through the backwash water discharge pipe (97).

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